Pull shovel excavator



1 38. A. C-ARLESIMO 2,106,402

- I PULL SHOVEL EXCAVATOR Filed March'lO, 1937 s Sheets-Sheet 1 k ,f1'g.1. F I

INVENTOR.

938. A. CARLESIMO PULLSHOVEL EXCAVATOR 5 Sheets-Sheet 2 'Filed Marh 10, 1957 INVEIQTOR )2710 Carl simo M A ORNEY.

UNITED STATES- PATENT;

. assembly, supporting a boom and Patented Jan. 25, 1938 oi-"rica 2,106,402 v rm sno'var. nxcnvaroa Angelo Carieslmo, mil-a, Mich.

' Application mesh 10,

1931, Serial No. 130,044

4 Claims. (cl. si ma) The improvements in pull shovel excavators invented by me refer to the construction and deof the boom used in such shovels, to the design and construction of the dipper by means of which the material is excavated and transferred, to means of bringing the buoketinto a quick dumpi g position and to novel means incorporated into the bucket of aiding in dumping the material excavated by the bucket.

The advantages of the construction arising out of my innovations are obvious and many and they will be clearly apparent from the detailed description of my improvements, which are illustrated in the dipper stick and the dipper.

Fig. 6 is a sectional elevational view taken on line 6-6 of Figure 3 and looking in the direction of the arrows. s

Fig. 7 is a side modified form of Fig. 8 is a view similar to Figure 6 but featuring the disclosure of Fig. 7.

Similar numerals throughout the several views.

The view shown in Fig. 1 presents a diagramelevation, dipper.

employed by me. Fig. 2, does not hinged mounting, as is the but is provided with two inward curves, one at the base, the other at the end, so that the main portion of the body of the boom rises above a straight imaginary'line connecting the base hinge t oi" said boom with the end of said boom. Spe- This-boom, as will be seen in partly in section. of a refer to similar parts extend in a straight line from its conventional practice,-

ciiically, boom 3; attached by hinge 8 to its base plate pivotally mounted on the rotating base 2, curves upward beginning at the said hinge from said imaginaryline connecting the center pin 1 of the base hinge 6. with the pin I! located at the other end of the'boom, describing an arc substantially oi. 90 degrees. The main portion of stantially its own width point. The mounting of as more, at its widest the .boom on the rotating base 2 is accomplished in the conventional vertical plane being controlled operated by the power plant on form of the shovel.

The illustration in Fig. 1 shows the boom opby cable means the control platerativeiy extending sideways over the end of the position the shovel is adapted Its base 1, and attached platform 2.

may be forked, as shown in Fig. by hinges 6 to its base plate on Now I wish to describe the construction and operation of my novel dipper 4. The innovation its other end to a member i5, which is hinged the top of the boom 3. The pin 42, serving to connectv the journalled ends of the link i 2 and member 15, serves also as the supporting axle for to a projection on end of said piished by means of-cable the -sheave M. A cable H, which is dead-ended at 89 by being secured to member I, the latter in turn being attached to the axle of the sheave l4, loops over the sheaveand is actuated and controlled by means of the cable drum on the operating platform of the shovel. A pull exerted from the drum upon the cable ILis transferred by means of the sheave It to link II, to the upper end of the boom stick 9 above the pin ll, swinging said upper part in the direction .of the pull and imparting an outward swing to the lower stick and to the dipper connected thereto. 'A pair of beams i8, disposedcrosswise of the dipper stick 9, is pivotally attached to the forked end of the boom, forward of the pivoted connection of the boom stick 9, the manner of connection being such that each beam is pivotally suspended from each forked end of the boom 3. At their lower ends, the beams are plvotally attached to hinges 20, one such hinge being formed on each side plate of the dipper substantially as shown. Shaft II of the hinge 20 extends transversely across the width of the dipper, connecting both its sidewalls, and serves as the axle for the pivotal support of the ejector or scraper 8, serving to remove from the interior of the dipper any material that may be therein, when the dipper has been brought into a dumping position as above stated. The ejector is composed of two parts, one being the handle 22 and the other provided with two parallel ribs 43 at the back. forming thus a recess into which the lower part of the handle is fitted and in which itis retained by lateral pins 2|. The pinsggl are of the variety known as the shearing pi and are intended to break incase of an excessive stress upon the ejector 8. The handle of the ejector is actuated by bar 25, pivotally connected substantially to the middle part of the boom stick 9 at M. The ejector I has the form oi a shovel extending transversely in the dipper, substantially across the whole width of said dipper. In operation, it is adapted to swing within the dipper in an are from the back of the dipper to its front, the lower end of the ejector moving closely to the bottom of said dipper l.

The digging operation oi -the shoVeL'particularly the digging operation of the dipper, is con .trolled by the cable 28 rolling over sheave 1 said-boom 3 and looping over sheave ber 29, hingediy attached to the front section of the dipper to journalled connections ll.

position of the ejector 0. when th digging and loading operation, is atthe back of the dipper, forming the back wall therein so that interferes with said loading or diggins. When positipii. a pull exerted intervening connecting me the dipper; brings the teeth-equipped lip of the dipper into a digging and loading engagem with the material to be worked upon.

As a result thereof, the dipper becomes mi terial. When it is intended that brought into a dumping position,

' Il actingupon sheave the dipper be ll, link I! and the dipper this time has assumed a position substantially at rightangle to the boom .3, assumes a new position substantiallyin continuation of the longitudinal axis of the boom; All durlns the change from the-loading position into adumpinl po i at a point somewhat being abroad plate body 23,

dipperisina' ed with said inn-- stick .I. Under the pull of the cable, the dipper'stick l, which up towhile the angle between the boom and the dipper stick widens, beams I! act upon the front end of the dipper, serving to accelerate the tilt of the dipper into a dumping position when the mouth of said dipper is'turned downward, as shown in 5 Fig. 3. It will .be'noted that the swing of the ejector l, actuatedby bar 25, is relatively smalls While the bottom of the dipper, which is actuated by the compound actionof the dipper stick 9 and the beams It, describes an arc, the ejector re- 10 tains relatively more or less the same position so that with relation to the bottom of the dipper, it is brought to the front part thereof, as shown in Fig. 3, and is mad to push out any material that may be therein. 16 It is possible to accelerate orretard the rate of the swing of the dipper by adjusting the length of the beams l8. This may he done by employing a shorter length of said beams and for that purpose additional provided. When the load of the dipper has been dumped by having the pper brought into a dumping position, as shown in Fig. 3, the front of the dipper is again brought into a digging ,position by means of cable 26 when the ejector 8 recedes towards the back of the dipper actuated bybeamsit. I A modification of the dipper is shown in Fig. 7. While the construction is substantially the same, it will be noted that the axle upon which the han- 30 die of the ejector is pivoted, is carried in bearings located not on the top of the bucket, as shown in Fig. 4, but on beams 32 corresponding to beams is in Fig. 4, and that the-ejector is actuated by arm it. Otherwise the, arrangement of parts is 3:, similar. It will be seen that the modification has oer-'- tain advantages. Since the ejectoris pivoted on the movable beams 32, and the angle between the top 34 of the dipper and the beams 32 varies, the 40 blade of the ejector will be able to'reach deeper into the bucket when said angle decreases and the bearing 38 is brought closer to said top of thebucket. As a result thereof, the bucket may be built deeper. providing material.

with respect to the dipper in which it is mounted, is gradual. The ejector, positioned first at the back of the dipper,v is gradually and steadily changing its relative position with respect to the bottom of the dipper, while the latter is being swung in anarc with respect to the boom into a dumping position. As I soon as this swing starts, theejector begins its pushing and ejecting action. Whenthe material may be accomplished by construction shown in so Figi'lj wherein arm 23 is provided with a slot ll,

sliding onpin 4!. The arrangement or an equivalent construction will allow some play between the parts, delaying the movement of the ejector with respect to the interior of the dipper. In other words, the arrangement will allow the ejec tor to remain idle at the beginning of the dump-.

but will begin itseiectins movement sometime after the initial swing of the dipper stick and thebuckt into a dumping podtion In. operating the boom, mprovisioh .is

that the dipper stickbe relieved from the stresse of,the cable operatlngupon thebooin, and this is elected by. having the sheave ll attached to the 15 bearings II or more maybe 20 a lasger capacity forof the dipper, the other. end above its pivotal Having thus described my invention embracing the aforesaid improvements, what I wish to claim is new and what I wish to protect by Letters Patent is: I

1. In a steam shovel employing a boom as a part thereof, in combination a tiltable dipper, a dipper stick provided with a plurality of selective bearings pivotally mounted in said boom, approximately at the end thereof, one end of said stick being pivotally attached to the back end mbunting on'the boom being connected to means responsive to the pull of a cable, beam means pivotally mounted on said boom forward of the pivotal connection of the stick, the body of said beam means crossing the stick and being pivotally attached at the other end of the upper middle section of the dipper, andcable means to actuate the said dipper and said dipper stick.

2. In a power operated pullshovel of the class described, in combination a boom, the main body portion of said boom being raised above the line connecting the base hinge and the point of said .boom, a dipper stick adapted to swing in an are from theend of said boom, a dipper adapted for digging and loading purposes hingedly suspended on said dipper stick, beam means pivoted on said boom cooperating with part to the dipper a tilting motion from a loading into a dumping position, cable means actuating said dipper stick, an ejector within the dipper comprising a pivotallyirl iiounted handle portion. and a' plate bodyportio' handle by safety pins adapted to break under 'excess stress, means connected to said handle and co-acting with said dipper stick to change the position of the ejector in an are from the back of the dipper when same is in a loading position to the front of the dipper when same isin a dumping position, and cable means to move the dipper from the loading into a dumpingposition.

3. In a power operated puilshovel oi the class said dipper stick to imsecured to the described, in combination a boom, the main body portion of said boom being raised above the line connecting the base hinge and the point of said boom, a dipper stick adapted to' swing in an arc from the end of said boom, a dipper adapted for digging and loading purposes hingedly suspended on said dipper stick, beam means pivoted on said boom, cooperating with said dipper stickto impart to the dippera tilting motion from a loading into a dumping position, cable means actuating said dipper stick, an ejector pivotally mounted comprising transversely disposed means within the interior of said dipper and extending substantially the whole width thereof, bar means to actuate said ejector, said means being slotted at one end and slidingly fitting over a'pin on the dipper stick, said bar means co-acting with said dipper stick to change the position of the ejector in an arc from the back of the dipper when same is in a loading position to the front of the dipper when same is in a dumping position, and cable means to move the dipper from the loading into a dumping position.

4. In a power operated pullshovel employing a boom as an operative part'thereof, in combination a dipper stick adapted to swing in an are from the end of said boom, a dipper adapted for digging and loading purposes, beam means pivoted on said boom, cooperating with said dipper stick to impart to the dipper a tilting motion from a loading intoa dumping position, an ejector comprising a movable plate body transversely disposed in said dipper and a handle to which said plate body is attached by'means yielding under excess stress, means pivotally and slottedly mounted on the dipper stick and adapted to impart to the ejector a retarded initial action in ,its movement from the back of the dipper when same is in a loading position to the front of the dipper when same is in a dumping position, and cable means to move the dipper from the loading into the dumping position.

ANGELO cARLEsiMo. 

